The former Iranian president mixes criticism of American racism with anti-Israel comments. Ahmadinejad quoted the Tupac song "Changes" to amplify his statements.
Des milliers de manifestants se sont emparés des rues du pays pour protester contre la vie chère et le pouvoir
Just because Ahmadinejad officially registered to run, however, does not mean he will be allowed to do so.
The announcement comes as a challenge to Ayatollah Ali Khamenei's authority.
Ahmadinejad had not announced any plans to run in the vote scheduled for May, but has made several speeches in recent months, prompting speculation of a political comeback.
An Iran poll survey suggests that the former president now trails incumbent Hassan Rouhani by just eight percentage points in a head-to-head match-up, compared with 27 points in May 2015.
Ahmadinejad reiterated that despite promises to improve ties between the two countries, the US is pursuing the same "hostile policies along with the same trend of enmity."
A Facebook and Instagram campaign were started shortly after the letter was published called "Demand for Trial of Mahmoud Ahmadinejad."
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The former Iranian president is making an intense media push as he returns to the public eye.